Animal Tissues - srmuniv.ac.in · Animal Tissues. Categories of Tissues. Jenna Hellack Jan ....
Transcript of Animal Tissues - srmuniv.ac.in · Animal Tissues. Categories of Tissues. Jenna Hellack Jan ....
Categories of Tissues
Jenna Hellack Jan
UNIT XIII
Animal Tissues
Categories of Tissues
Jenna Hellack Jan
Categories of TissuesEpitheliumConnectiveMuscleNervous
Categories of Tissues
Jenna Hellack Jan
EpitheliumLines, covers, and protects other tissues and organs.Characterized by:
Cells tightly junked togetherThe presence of a cell secretion called the basement membrane.
Named by:Cell shapeOther characteristics of the cells.
Squamous, Cuboidal, and Columnar
Categories of Tissues
Jenna Hellack Jan
Squamous EpitheliumCells very thin, much wider than they are thick.
Simple Squamous EpitheliumAir sacs of respiratoryLining of blood vessels, heart and lymphatic tubes
Stratified Squamous EpitheliumSkinVaginaEsophagusMouth
Categories of Tissues
Jenna Hellack Jan
Examples of Simple Squamous Epithelium
Categories of Tissues
Jenna Hellack Jan
Stratified Squamous Epithelium
Categories of Tissues
Jenna Hellack Jan
Cuboidal EpitheliumCells cube shaped- secretion and absorption.
Kidney tubulesDuct and small glandsSurface of ovary
Categories of Tissues
Jenna Hellack Jan
Columnar EpitheliumElongated cells, much longer than they are wide.
Simple Columnar EpitheliumA single layer of cells that line the digestive tract, gallbladder and excretory ducts of some glands. Has microvilli at surface for absorption.
Pseudostratified ciliated columnar epithelium
Lines the bronchi, trachea, uterine tubes and some of the uterus. Propels mucus or reproductive cells by ciliary action.
Categories of Tissues
Jenna Hellack Jan
Simple Columnar epithelium
Categories of Tissues
Jenna Hellack Jan
Pseudostratified Ciliated Columnar Epithelium
Categories of Tissues
Jenna Hellack Jan
Connective TissueCharacterized by the cells widely separated from each other in a matrix that is produced by the cells.Tissue protects and supports.Cell Matrix composed of two regions
GroundLiquid (sol), Gel, Gum or solid
FibersNon-elastic (= white or Collagen)Elastic (= yellow fibers)
Types of Connective tissue
Categories of Tissues
Jenna Hellack Jan
Types of Connective TissueLoose (Areolar) Connective TissueDense Connective TissueAdiposeCartilageBoneBlood
Categories of Tissues
Jenna Hellack Jan
Loose Connective Tissue (Areolar)
Gel like ground with both elastic and non-elastic fibers running though the ground in many directions.
Wraps and cushions organsUnder the skin
Categories of Tissues
Jenna Hellack Jan
Dense Regular Connective Tissue
Nuclei and fibers arranged in parallel rows.Tendons and ligamentsFibers mostly non-elastic
Categories of Tissues
Jenna Hellack Jan
Adipose (Fat)Function as storage cells for adipose(lipids)Adipose cells contain a large vacuole which in the live cell contains lipids.Cell nucleus and cytoplasm are pushed out to edge of cell membrane.
Categories of Tissues
Jenna Hellack Jan
CartilageGround of matrix is gum like.Cells are found in Lacunae within the matrix.Fibers may be elastic or non-elastic, or a form of non-elastic called reticular(where the non-elastic fibers of very thin)
Hyaline Cartilage-example on the ends of bonesElastic Cartilage- example ear cartilageNon-elastic Cartilage- example nose cartilage.
Categories of Tissues
Jenna Hellack Jan
Hyaline cartilage
Categories of Tissues
Jenna Hellack Jan
Elastic Cartilage
Categories of Tissues
Jenna Hellack Jan
BoneGround of matrix is Solid (Calcium carbonate).Has blood supply and nerves running through the Haversian canal systems.
Categories of Tissues
Jenna Hellack Jan
Vascular Tissue (Blood)Liquid matrix = plasma
90% water10%Plasma proteins, electrolytes, hormones, oxygen, glucose etc.
Formed elementsErythrocytes -48billion(female) to 54 billion (male) cell / ml of blood in humans. Mammals are enucleated while rest of the vertebrates they have nucleiLeukocytes -about 7.5 million / ml of bloodPlatelets -blood clotting
Categories of Tissues
Jenna Hellack Jan
Blood
Categories of Tissues
Jenna Hellack Jan
Muscle TissueTissue with cells having fibers specialized for contraction.
Skeletal Muscle (Striated, voluntary) Parallel elongated cells (fibers) multinucleated and each cell is the length of the muscle.Light meat, Dark meat—Slow twitch, fast twitch muscle
Smooth Muscle (Visceral, involuntary)Cells are long and tapered. Organized into sheets of muscle.
Cardiac MuscleIntercalated discMyogenicbranched
Categories of Tissues
Jenna Hellack Jan
Skeletal Muscle
Categories of Tissues
Jenna Hellack Jan
Smooth Muscle
Categories of Tissues
Jenna Hellack Jan
Cardiac Muscle
Categories of Tissues
Jenna Hellack Jan
Nervous TissueCells specialized to polarize and depolarize.Cell is a neuron
Categories of Tissues
Jenna Hellack Jan
End of Tissue presentation